render/pixman/pixel_format: add more formats
render/pixman/pixel_format: add more formats

Add a bunch of new formats for Pixman: a few missing 32-bit ones,
some 16-bit and 32-bit formats as well.

Mostly based on a Weston patch [1].

[1]: https://gitlab.freedesktop.org/wayland/weston/-/merge_requests/664

swaywm/wlroots,SirCmpwn/wlroots,swaywm/wlroots